Table 4.

Principal Components Analyses. Organohalogens and trace elements that are in each of the six principal components (PCs) with eigenvalues (in parentheses) >1. Variation of total contaminant burden attributed to each PC variable accounts is presented [in brackets]. Analytes included in the PCA were detectable in ≥70% of blood samples and were expressed in units of μg/kg lipid (POHs), nmol/L (*) or μmol/L (**). All analytes were transformed by log10(x+1). These six PCs account for 81% of the variance in the original matrix. Loadings ≥ 0.45 are underlined.

Contaminant	PC-1 (10..6) [44.7%]	PC-2 (2.3) [9.6%]	PC-3 (2.2) [9.2%]	PC-4 (1.78) [7.4%]	PC-5 (1.31) [5.7%]	PC-6 (1.15) [4.8%]
trans-Nonachlor	0.918	−0.154	−0.130	0.069	−0.028	−0.081
Oxychlordane	0.884	−0.116	−0.118	0.134	−0.002	−0.029
p,p'-DDE	0.923	−0.208	−0.161	0.131	0.018	−0.025
PBDE 47	0.282	−0.298	0.679	−0.039	0.113	−0.030
PBDE 153	0.606	−0.310	0.536	0.264	0.082	−0.064
PCB 118	0.956	−0.021	−0.107	−0.095	−0.028	−0.019
PCB 138	0.986	−0.018	−0.011	−0.043	−0.021	−0.025
PCB 153	0.985	−0.014	0.002	−0.044	−0.030	0.006
PCB 163	0.985	−0.010	−0.014	−0.026	−0.079	0.049
PCB 170	0.985	0.001	−0.010	0.002	−0.069	−0.011
PCB 180	0.982	−0.020	−0.004	0.026	−0.055	−0.029
PCB 187	0.982	0.009	−0.005	−0.039	−0.054	0.010
Cadmium*	−0.116	−0.058	0.635	0.271	0.451	0.363
Cobalt*	−0.392	−0.107	0.048	0.674	−0.256	0.204
Copper**	−0.239	−0.298	−0.502	0.344	−0.217	0.383
Lead**	0.412	0.637	−0.122	0.413	0.091	0.172
Molybdenum*	−0.434	−0.110	−0.135	−0.594	0.167	−0.152
Nickel*	−0.363	0.412	−0.018	0.388	−0.258	−0.223
Selenium**	−0.106	0.128	0.513	−0.075	−0.530	0.039
Thallium*	0.362	0.528	0.093	−0.320	0.006	0.418
Total Arsenic*	0.131	0.658	0.399	0.068	0.277	−0.110
Total Mercury*	0.294	0.577	−0.393	−0.058	0.300	0.219
Uranium*	−0.132	−0.519	−0.251	0.109	0.523	0.275
Zinc**	0.037	−0.102	0.196	−0.455	−0.363	0.632